Pump-plunger.



PATENTED APR. '7, 1903..

Escom?.

PUMP PLUNGER.

APPLICATIONl FILED NOV. 2l 1901.

2 SHEETS-SHEET 1 NO MODEL.

i Q /H&

m M m I' No. 724,512.

PATENTBD APR. '7, 1903 B. SCOTT.

PUMP PLUNGER.

APPLICATION FILED Nov. 2, 1901.

No MODEL. 2 SHEETS-SHEET 2.

'HIMHMDM "#11111111111 valve mechanism UNITED STATES' PATENT OFFICE.

yEUGENE SCOTT, OF TOYAH, TEXAS.

P-PLUNGER.

SPECIFICATION forming part of Letters Patent N o. 724,512, dated April7, 1903.

Application filed November 2. 1901. Serial No. 80,950. (No model.)

valve mechanisms and also an attachment` to the plunger mechanismwhereby the footcan be removed when de'- sired. i With these objects inview the invention consists in the peculiar construction of the variousparts and in their novel combination or arrangement, all of which willbe fully described hereinafter and pointed out in the claims.

In the drawings forming part of this specification, Figure l is a Viewillustrating the plunger-valve mechanism and lower-valve mechanismcoupled together aud being eX- tracted from thetube of the well. Fig. 2is a vertical sectional view of the plunger-valve mechanism,thefoot-valve mechanism,and the connections between the two. Fig. 3 is asection on the line 3 3 ofFig. 2. Fig. et is a section on the line 4 4of Fig. 2. Fig. 5 is a section on the line 5 5 of Fig. 2.V Fig. 6 is aview illustrating in perspective the several parts of the plunger-valvemechanism, foot-valvemechanism, connections, packing-rings, &c.

In carrying out my invention I employ a plunger-rod A, the lower end ofwhich has a' threaded socket A', which screws upon the threadedprojection B of the upper cage C,

said cage carrying the upper check-valve D, which rests upon theupper-valve seat E, said valve-seat E being screwed into the lower.

end of the cage C, as most clearly shown in Fig. 2.

F indicates the lower check-valve, which is arranged in the lower cageG, said lower-cage being connected to the upper cage by means ofacylindrical coupling H. The lower checkvalve F has the stem D connectedthereto, the upper check-valve sliding upon the upper 'end of said stemD. The lower face of the valve F is provided with guide-wings F.

The exterior of the upper case C is providedwith a ring C', and thelower cage G is formed with a ring G', and between the cylindrical.coupling H and the said upper and lower rings C' and G' are arrangedthe packingrings I, said packing-rings being preferably made ofcomposite fabric, the ends being united by means of soft rubber I',secured in the notched ends of the packing-rings arranged in pairs.yEach pair surrounds a thin band of copper K, the' ends of which overlap,as shown in Figs. 3 and 4, which is interposed between the cage and thesaid packing-rings. Bythis constructionthe thin copper band or diaphragmK is spread by the pressure of the water above the plunger, therebyexpanding the packing-rings I and insuring a close fit. The coupledvalve construction shown is preferred, because'each cooperates to guidethe other and in addition each serves to retain the water in therespective chambers above them,

and thereby keep the packing-rings dilated,-

though this is not essential. The foot-valve L rests upon the seat M,which seat has a cage N connected thereto, the upper portion of the cagehaving an elongated opening O, the center of which is slightly enlarged,as most clearly shown in Fig. 6. The lower cage G has a depending yokeP, from which extends a shank Q, terminating in a head R, which head isadapted to be passed through the opening O and when turned at a rightangle to the major diameter of the said opening a coupling will beeffected between the said depending yoke v and the foot-valve cage,thereby establishing a connection between the plunger-valve mechanismand the foot-valve mechanism. A sectional washer-ring S surrounds theshank Q and serves to take up any lost motion between the depending yokeand foot-valve cage.

It will of course be understood that the footvalve mechanism is locatedin the well-tube and the plunger-valve mechanism operates entirelyindependent of the same. At each operation of the plunger-rod A theupper and lower check-valve will become seated'and unseated, therebypumping thev water up the well-tube. Whenever it is desired to removethe foot-valve, plunger-rod A is forced' a slightdistance downward, thehead R passing through the opening O, and by giving IOO the plunger-roda quarter-turn the plungerrod mechanism and the foot-valve mechanism arecoupled together and both can be drawn out of the tubo at the same time.

Having thus fully'described my invention, what I claim as new, anddesire to secure by Letters Pat-ent, is-

l. The combination with a pump-plunger, of a valve-cage secured to theend of said plunger, an eXteriorly-threadedv valve-seat secured in saidcage, a valve in said cage, a lower valve-cage having avalve-seat formedin its lower end, a valve adapted to seat therein said valve having athreaded socket in its upper portion, a guide-rod threaded on its lowerend secured in said socket, and means whereby the upper valve is adaptedto slide on said guide-rod.

2. The combination with a pump-plunger, of a valve-cage secured to theplunger and having an exterior annular ring formed on it, packing-rings,the upper packing-ring bearing against the ring of the cage saidpacking-rings being composed of a composite fabric and having notchedends, a rubber composition illing said notches and connecting the endsof the rings, and a thin iiexible metal band having overlapping endsarranged Within said packing-rings as and for the purpose specified. i

3. In a pump-plunger, the combination with 'a pump-plunger, ofvalve-cages, secured to the lower end of the plunger, valves in saidcages, the lower valve carrying an upwardly-extending guide-rod and theupper valve being adapted to slide on said rod, an annular metal bandhaving overlapping ends around each cage, two transverselysplit ringssurrounding said band and an elastic composition between the ends of therings.

EUGENE SCOTT. Witnesses:

" J. B. GIBSON,

T. R. OWEN.

